单播、广播、组播 UDP支持三种主要的通信方式:单播(Unicast)、广播(Broadcast)、组播(Multicast)。每种方式都有其特定的应用场景和特点,下面分别进行介绍。 1、单播。单播是最常见的网络通信方式,它是指从一个发送者到一个特定接收者的点对点通信。大多数基于TCP/IP的应用程序都使用单播,比如:Web浏览、电子邮件等。...
// 发送数据 DatagramPacketsendPacket=newDatagramPacket(feedback,feedback.length,packet.getAddress(), BROADCAST_PORT); 这里需要指定端口为BROADCAST_PORT,因为DISCOVER_REQUEST报文的的端口是随机的。不然无法在BROADCAST_PORT端口接收到DISCOVER_RESPONSE报文,新加入局域网的设备就无法感知其他设备的存在。 2、广播发送...
// 发送数据DatagramPacketsendPacket=newDatagramPacket(feedback, feedback.length, packet.getAddress(), BROADCAST_PORT); 这里需要指定端口为BROADCAST_PORT,因为DISCOVER_REQUEST报文的的端口是随机的。不然无法在BROADCAST_PORT端口接收到DISCOVER_RESPONSE报文,新加入局域网的设备就无法感知其他设备的存在。 广播发送线...
UDP allows you to send a packet, with or without a checksum, and redirects the packet (multiplexes it) to a listening application based on the port number the packet was sent to. A single packet can be sent to multiple machines at once by using multicast and broadcast transmission. ...
UdpClient 方法还允许发送和接收多播数据报。 JoinMulticastGroup使用 方法将 订阅UdpClient到多播组。 DropMulticastGroup使用 方法从多播组取消订阅 UdpClient。构造函数 展开表 UdpClient() 初始化 UdpClient 类的新实例。 UdpClient(AddressFamily) 初始化 UdpClient 类的新实例。 UdpClient(Int32) 初始化 Udp...
./udp-broadcast-relay-redux --id 1 --port 5353 --dev eth0 --dev eth1 --multicast 224.0.0.251 -s 1.1.1.1 (Chromecast requires broadcasts to originate from an address on its subnet) SSDP (Roku Discovery + More) ./udp-broadcast-relay-redux --id 1 --port 1900 --dev eth0 --dev ...
If you call theConnectmethod, any datagrams that arrive from an address other than the specified default will be discarded. You cannot set the default remote host to a broadcast address using this method unless you inherit fromUdpClient, use the Client method to obtain the underlyingSocket, and...
<HUAWEI> display udp statistics Received packets: Total: 104808 Total(64bit high-capacity counter): 104808 checksum error: 0 shorter than header: 0 data length larger than packet: 0 unicast(no socket on port): 0 broadcast/multicast(no socket on port): 104808 not delivered, input socket full...
图片广播广播英文名叫Broadcast,单个设备向网络上的所有其他设备发送通信。...图片组播组播英文名叫Multicast,也叫多播,支持从一个节点到多个接收者的单个数据传输副本,发送设备会将 UDP 数据包转发到组播 IP 地址和端口,以便所有想要接收流的目的地都可以接收传输,从而节省带宽和网络开销...Specific Query 具体查询...
import socket if __name__ == '__main__': # 创建udpsocket udp_socket = socket.socket(socket.AF_INET...SO_BROADCAST: 广播选项 # 3...True:开启发送广播消息功能 udp_socket.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, True) # 192.168.131.255...: 只给131网段发送广播消息 # 255.255...